Analysis of trace impurities in neon by a customized gas chromatography

作者：Yin Min Kyo; Lim Jeong Sik; Moon Dong Min; Lee Gae Ho; Lee Jeongsoon^*

来源：Journal of Chromatography A, 2016, 1463: 144-152.

DOI：10.1016/j.chroma.2016.07.057

• Excimer laser
• PDNeD
• Pressurized injection Ne-TCD
• Modified GC-TCD-PDNeD

Excimer lasers, widely used in the semiconductor industry, are crucial for analyzing the purity of premix laser gases for the purpose of controlling stable laser output power. In this study, we designed a system for analyzing impurities in pure neon (Ne) base gas by customized GC. Impurities in pure neon (H-2 and He), which cannot be analyzed at the sub-mu mol/mol level using commercial GC detectors, were analyzed by a customized pulsed-discharge Ne ionization detector (PDNeD) and a pressurized injection thermal conductivity detector using Ne as the carrier gas (Pres. Inj. Ne-TCD). From the results, trace species in Ne were identified with the following detection limits: H-2, 0.378 mol/mol; O-2, 0.119 mu mol/mol; CH4, 0.880 mu mol/mol; CO, 0.263 mu mol/mol; CO2, 0.162 mu mol/mol (PDNeD); and He, 0.190 mu mol/mol (Pres. Inj. Ne-TCD). This PDNeD and pressurized injection Ne-TCD technique thus developed permit the quantification of trace impurities present in high-purity Ne.

• 出版日期2016-9-9